Spectroscopic studies on complexes of magnesium (II) with C2-chiral bis-oxazolines

Article abstract of DOI:10.1016/S1386-1425(97)00068-1

The configurations of chloro, ethyl and bis-complexes of magnesium with C₂-chiral bis-oxazolines such as 2,2′-methylenebis[(4S)-4-iso-propyl-2-oxazoline] (MBIO). 2,2′-methylenebis[(4S)-4-tert-butyl-2-oxazoline] (MBTO) and 2,2′-methylenebis[(4S)-4-phenyl-2-oxazoline] (MBPO) have been investigated on the basis of spectroscopic studies. The IR and NMR (¹H, ¹³C) data suggested that the bis-oxazoline ligands coordinated magnesium (II) through both the nitrogen atoms. The molecular weight determination in nitrobenzene indicated the dimeric nature of chloro and ethylmagnesium complexes whereas bis-magnesium complexes were found to be monomeric.